4C4K

Crystal structure of the titin M10-Obscurin Ig domain 1 complex

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
IMGT Antibody Annotation
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Pharos: Disease Associations

Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A [auth O]	d4c4ko1	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	automated matches	automated matches	HUMAN (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
A [auth O]	d4c4ko2	Artifacts	Tags	Tags	Tags	N-terminal Tags	HUMAN (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
B [auth T]	d4c4kt_	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	automated matches	automated matches	HUMAN (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A [auth O]	SCOP2 Family	I set domains	8077372	4007543	SCOP2 (2022-06-29)
A [auth O]	SCOP2 Superfamily	Immunoglobulin (Ig) domain-like	8077373	3000071	SCOP2 (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A [auth O]	PF07679	e4c4kO1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: PF07679	ECOD (1.6)
B [auth T]	PF07679	e4c4kT1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: PF07679	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A [auth O]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
B [auth T]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)

IMGT Antibody Annotation IMGT Database Homepage

Chain	Protein Name	Description	Organism Name	Gene Allele Name(s)	Domain Name(s)	Receptor Type	Receptor Description	Provenance Source
A [auth O]	OBSCN (Obscurin)	OBSCN	Homo sapiens (human)	OBSCN*01	C-LIKE-DOMAIN C-LIKE	RPI	OBSCN	IMGT (202417-0)
B [auth T]	TITIN	TITIN	Homo sapiens (human)	TTN*01	C-LIKE-DOMAIN C-LIKE	RPI	TITIN	IMGT (202417-0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A [auth O]	PF07679	Immunoglobulin I-set domain (I-set)	Immunoglobulin I-set domain	-	Domain
B [auth T]	PF07679	Immunoglobulin I-set domain (I-set)	Immunoglobulin I-set domain	-	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A [auth O]	OBSCURIN	cytoskeletal protein binding titin binding protein binding binding structural molecule activity structural constituent of muscle ankyrin binding catalytic activity, acting on a protein kinase activity protein kinase activity transferase activity catalytic activity protein serine kinase activity phosphotransferase activity, alcohol group as acceptor cytoskeletal protein binding titin binding protein binding binding structural molecule activity structural constituent of muscle ankyrin binding catalytic activity, acting on a protein kinase activity protein kinase activity transferase activity catalytic activity protein serine kinase activity phosphotransferase activity, alcohol group as acceptor transferase activity, transferring phosphorus-containing groups ion binding phosphatidylinositol-4,5-bisphosphate binding anion binding phosphatidylinositol bisphosphate binding phospholipid binding lipid binding phosphatidylinositol phosphate binding phosphatidylinositol binding small molecule binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding purine nucleotide binding organic cyclic compound binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding phosphatidylinositol-3,4-bisphosphate binding protein serine/threonine kinase activity GTPase regulator activity enzyme regulator activity guanyl-nucleotide exchange factor activity nucleoside-triphosphatase regulator activity molecular function regulator activity phosphatidylinositol-3,4,5-trisphosphate binding calmodulin binding phosphatidylinositol-4-phosphate binding phosphatidylinositol-5-phosphate binding phosphatidylinositol-3-phosphate binding cation binding metal ion binding	cellular response to stimulus regulation of biological process regulation of signaling regulation of cellular process small GTPase-mediated signal transduction response to stimulus signaling regulation of small GTPase mediated signal transduction biological regulation regulation of signal transduction intracellular signal transduction cell communication regulation of intracellular signal transduction regulation of response to stimulus intracellular signaling cassette cellular response to stimulus regulation of biological process regulation of signaling regulation of cellular process small GTPase-mediated signal transduction response to stimulus signaling regulation of small GTPase mediated signal transduction biological regulation regulation of signal transduction intracellular signal transduction cell communication regulation of intracellular signal transduction regulation of response to stimulus intracellular signaling cassette regulation of cell communication cellular process signal transduction phosphorylation cellular metabolic process phosphate-containing compound metabolic process metabolic process phosphorus metabolic process protein localization protein localization to M-band localization cellular localization protein localization to organelle cellular macromolecule localization macromolecule localization cellular developmental process cellular component assembly involved in morphogenesis non-membrane-bounded organelle assembly cell development muscle cell differentiation cellular component organization cellular component biogenesis muscle structure development striated muscle cell development cellular anatomical entity morphogenesis cellular component assembly muscle cell development cell differentiation sarcomere organization anatomical structure development actin filament-based process cellular component organization or biogenesis developmental process actomyosin structure organization actin cytoskeleton organization organelle assembly anatomical structure morphogenesis myofibril assembly organelle organization anatomical structure formation involved in morphogenesis striated muscle cell differentiation supramolecular fiber organization cytoskeleton organization	M band intracellular anatomical structure cellular anatomical entity sarcomere intracellular organelle organelle intracellular non-membrane-bounded organelle contractile muscle fiber A band cytoplasm supramolecular fiber myofibril supramolecular polymer supramolecular complex M band intracellular anatomical structure cellular anatomical entity sarcomere intracellular organelle organelle intracellular non-membrane-bounded organelle contractile muscle fiber A band cytoplasm supramolecular fiber myofibril supramolecular polymer supramolecular complex non-membrane-bounded organelle Z disc I band cytosol cell periphery sarcolemma plasma membrane membrane membrane-bounded organelle nucleus membrane-enclosed lumen intracellular membrane-bounded organelle intracellular organelle lumen nuclear body nucleoplasm organelle lumen nuclear lumen
B [auth T]	TITIN	cytoskeletal protein binding actin binding protein-containing complex binding protein binding binding actin filament binding structural molecule activity structural constituent of muscle alpha-actinin binding actinin binding muscle alpha-actinin binding protein tyrosine kinase activity catalytic activity, acting on a protein kinase activity cytoskeletal protein binding actin binding protein-containing complex binding protein binding binding actin filament binding structural molecule activity structural constituent of muscle alpha-actinin binding actinin binding muscle alpha-actinin binding protein tyrosine kinase activity catalytic activity, acting on a protein kinase activity protein kinase activity transferase activity catalytic activity phosphotransferase activity, alcohol group as acceptor transferase activity, transferring phosphorus-containing groups adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding organic cyclic compound binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding small molecule binding calmodulin binding identical protein binding cation binding calcium ion binding metal ion binding enzyme binding protease binding structural molecule activity conferring elasticity protein serine kinase activity kinase binding protein kinase binding protein serine/threonine kinase activity telethonin binding	multicellular organismal process system process muscle contraction muscle system process striated muscle contraction response to stimulus response to metal ion response to chemical response to calcium ion response to inorganic substance regulation of cellular process cellular biosynthetic process positive regulation of biological process positive regulation of cellular metabolic process multicellular organismal process system process muscle contraction muscle system process striated muscle contraction response to stimulus response to metal ion response to chemical response to calcium ion response to inorganic substance regulation of cellular process cellular biosynthetic process positive regulation of biological process positive regulation of cellular metabolic process positive regulation of macromolecule biosynthetic process positive regulation of metabolic process organic substance metabolic process positive regulation of biosynthetic process organic substance biosynthetic process positive regulation of macromolecule metabolic process positive regulation of cellular process regulation of biosynthetic process regulation of biological process cellular metabolic process biological regulation regulation of cellular metabolic process regulation of macromolecule metabolic process gene expression macromolecule biosynthetic process regulation of cellular biosynthetic process regulation of gene expression biosynthetic process positive regulation of gene expression regulation of macromolecule biosynthetic process metabolic process cellular process macromolecule metabolic process regulation of metabolic process positive regulation of cellular biosynthetic process cellular developmental process cellular component assembly involved in morphogenesis non-membrane-bounded organelle assembly skeletal myofibril assembly cell development muscle cell differentiation cellular component organization cellular component biogenesis muscle structure development striated muscle cell development cellular anatomical entity morphogenesis cellular component assembly muscle cell development cell differentiation actin filament-based process anatomical structure development cellular component organization or biogenesis developmental process skeletal muscle thin filament assembly actin cytoskeleton organization actomyosin structure organization organelle assembly actin filament organization anatomical structure morphogenesis organelle organization myofibril assembly anatomical structure formation involved in morphogenesis striated muscle cell differentiation supramolecular fiber organization cytoskeleton organization mitotic nuclear division mitotic chromosome condensation organelle fission chromosome organization sister chromatid segregation mitotic cell cycle nuclear division mitotic cell cycle process chromosome condensation mitotic sister chromatid segregation nuclear chromosome segregation cell cycle chromosome segregation cell cycle process phosphorylation phosphate-containing compound metabolic process phosphorus metabolic process detection of external stimulus detection of stimulus detection of mechanical stimulus detection of muscle stretch response to mechanical stimulus response to external stimulus response to abiotic stimulus detection of abiotic stimulus response to muscle stretch regulation of protein modification process regulation of catalytic activity regulation of protein phosphorylation regulation of transferase activity regulation of primary metabolic process regulation of phosphate metabolic process protein metabolic process protein modification process organonitrogen compound metabolic process protein phosphorylation regulation of protein metabolic process primary metabolic process regulation of protein kinase activity regulation of molecular function regulation of kinase activity macromolecule modification regulation of phosphorylation regulation of phosphorus metabolic process myosin filament assembly protein-containing complex assembly skeletal muscle myosin thick filament assembly protein-containing complex organization myosin filament organization striated muscle myosin thick filament assembly heart development cardiac muscle tissue development heart morphogenesis animal organ development tissue development muscle tissue morphogenesis striated muscle tissue development circulatory system development multicellular organism development tissue morphogenesis cardiac muscle tissue morphogenesis animal organ morphogenesis muscle organ development muscle tissue development muscle organ morphogenesis system development sarcomerogenesis cellular response to stimulus signaling intracellular signal transduction cell communication protein kinase A signaling signal transduction protein localization regulation of localization establishment of protein localization cellular localization nitrogen compound transport regulation of protein localization transport positive regulation of establishment of protein localization positive regulation of secretion by cell protein localization to extracellular region positive regulation of protein transport localization regulation of secretion by cell secretion by cell positive regulation of secretion cellular macromolecule localization regulation of transport secretion organic substance transport regulation of establishment of protein localization establishment of protein localization to extracellular region export from cell regulation of protein transport protein secretion establishment of localization positive regulation of protein secretion regulation of protein secretion regulation of secretion positive regulation of transport protein transport regulation of cellular localization macromolecule localization positive regulation of protein localization muscle hypertrophy cardiac muscle hypertrophy striated muscle hypertrophy cardiac muscle cell development cardiac cell development cardiac muscle cell differentiation cardiocyte differentiation heart process circulatory system process cardiac muscle contraction heart contraction blood circulation cardiac myofibril assembly sarcomere organization	M band intracellular anatomical structure cellular anatomical entity sarcomere intracellular organelle organelle intracellular non-membrane-bounded organelle contractile muscle fiber A band cytoplasm supramolecular fiber myofibril supramolecular polymer supramolecular complex M band intracellular anatomical structure cellular anatomical entity sarcomere intracellular organelle organelle intracellular non-membrane-bounded organelle contractile muscle fiber A band cytoplasm supramolecular fiber myofibril supramolecular polymer supramolecular complex non-membrane-bounded organelle Z disc I band extracellular exosome membrane-bounded organelle extracellular vesicle extracellular organelle extracellular region extracellular space vesicle extracellular membrane-bounded organelle cytosol striated muscle thin filament myofilament actin cytoskeleton cytoskeleton condensed nuclear chromosome nucleus membrane-enclosed lumen nuclear chromosome chromosome intracellular membrane-bounded organelle intracellular organelle lumen organelle lumen condensed chromosome nuclear lumen

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A [auth O]	IPR017441	Protein kinase, ATP binding site	Binding Site
A [auth O]	IPR001849	Pleckstrin homology domain	Domain
A [auth O]	IPR036179	Immunoglobulin-like domain superfamily	Homologous Superfamily
A [auth O]	IPR003599	Immunoglobulin subtype	Domain
A [auth O]	IPR003598	Immunoglobulin subtype 2	Domain
A [auth O]	IPR000219	Dbl homology (DH) domain	Domain
A [auth O]	IPR008266	Tyrosine-protein kinase, active site	Active Site
A [auth O]	IPR036028	SH3-like domain superfamily	Homologous Superfamily
A [auth O]	IPR035526	Obscurin, SH3 domain	Domain
A [auth O]	IPR000719	Protein kinase domain	Domain
A [auth O]	IPR011993	PH-like domain superfamily	Homologous Superfamily
A [auth O]	IPR013106	Immunoglobulin V-set domain	Domain
A [auth O]	IPR000048	IQ motif, EF-hand binding site	Binding Site
A [auth O]	IPR013098	Immunoglobulin I-set	Domain
A [auth O]	IPR003961	Fibronectin type III	Domain
A [auth O]	IPR011009	Protein kinase-like domain superfamily	Homologous Superfamily
A [auth O]	IPR001452	SH3 domain	Domain
A [auth O]	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
A [auth O]	IPR035899	Dbl homology (DH) domain superfamily	Homologous Superfamily
A [auth O]	IPR007110	Immunoglobulin-like domain	Domain
A [auth O]	IPR008271	Serine/threonine-protein kinase, active site	Active Site
A [auth O]	IPR036116	Fibronectin type III superfamily	Homologous Superfamily
B [auth T]	IPR036179	Immunoglobulin-like domain superfamily	Homologous Superfamily
B [auth T]	IPR008266	Tyrosine-protein kinase, active site	Active Site
B [auth T]	IPR000719	Protein kinase domain	Domain
B [auth T]	IPR013106	Immunoglobulin V-set domain	Domain
B [auth T]	IPR015129	Titin, Z repeat	Repeat
B [auth T]	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
B [auth T]	IPR007110	Immunoglobulin-like domain	Domain
B [auth T]	IPR004168	PPAK motif	Repeat
B [auth T]	IPR003599	Immunoglobulin subtype	Domain
B [auth T]	IPR003598	Immunoglobulin subtype 2	Domain
B [auth T]	IPR040849	MyBP-C, tri-helix bundle domain	Domain
B [auth T]	IPR013098	Immunoglobulin I-set	Domain
B [auth T]	IPR003961	Fibronectin type III	Domain
B [auth T]	IPR011009	Protein kinase-like domain superfamily	Homologous Superfamily
B [auth T]	IPR036116	Fibronectin type III superfamily	Homologous Superfamily

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A [auth O]	Pharos: Q5VST9	breast cancer malignant colon neoplasm rhabdomyolysis colorectal cancer Malignant neoplasm of breast lung cancer medulloblastoma
B [auth T]	Pharos: Q8WZ42	limb-girdle muscular dystrophy dilated cardiomyopathy myopathy myopathy, myofibrillar, 9, with early respiratory failure tibial muscular dystrophy early-onset myopathy with fatal cardiomyopathy autosomal recessive limb-girdle muscular dystrophy type 2J distal myopathy hypertrophic cardiomyopathy 9 dilated cardiomyopathy 1G atrial fibrillation familial dilated cardiomyopathy hypertrophic cardiomyopathy arrhythmogenic right ventricular cardiomyopathy lung adenocarcinoma limb-girdle muscular dystrophy dilated cardiomyopathy myopathy myopathy, myofibrillar, 9, with early respiratory failure tibial muscular dystrophy early-onset myopathy with fatal cardiomyopathy autosomal recessive limb-girdle muscular dystrophy type 2J distal myopathy hypertrophic cardiomyopathy 9 dilated cardiomyopathy 1G atrial fibrillation familial dilated cardiomyopathy hypertrophic cardiomyopathy arrhythmogenic right ventricular cardiomyopathy lung adenocarcinoma Muscle Weakness cardiomyopathy urinary bladder carcinoma Emery-Dreifuss muscular dystrophy familial isolated dilated cardiomyopathy hereditary spastic paraplegia amyotrophic lateral sclerosis lung carcinoma B-cell chronic lymphocytic leukemia muscle tissue disease muscular dystrophy colorectal adenocarcinoma ovarian mucinous adenocarcinoma squamous cell lung carcinoma gastric adenocarcinoma intellectual disability autosomal recessive centronuclear myopathy lung large cell carcinoma Becker muscular dystrophy centronuclear myopathy ovarian serous adenocarcinoma dilated cardiomyopathy 1A familial hypertrophic cardiomyopathy heart disease kidney Wilms tumor arthrogryposis lung cancer metastatic melanoma muscular disease myopathy, centronuclear, 2 Charcot-Marie-Tooth disease non-small cell lung carcinoma